package com.heima.search.service.impl;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.search.pojo.ApAssociateWords;
import com.heima.search.service.ApAssociateWordsService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class ApAssociateWordsServiceImpl implements ApAssociateWordsService {

    @Autowired
    private MongoTemplate mongoTemplate;

    /**
     * 搜索联想词
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto dto) {

        //检验
        if(StringUtils.isBlank(dto.getSearchWords())){
            return ResponseResult.okResult(null);
        }

        //判断分页条数
        int pageSize = dto.getPageSize();
        if(pageSize > 50){
            pageSize = 20;
        }

        Query query = Query.query(Criteria.where("associateWords").regex("^.*" + dto.getSearchWords() + ".*$")).limit(pageSize);
        List<ApAssociateWords> apAssociateWords = mongoTemplate.find(query, ApAssociateWords.class);
        return ResponseResult.okResult(apAssociateWords);
    }
}
